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Granulation method of salt mixture containing potassium chloride and magnesium sulfate hydrate

A technology of mixture and magnesium sulfate, which is applied in the field of granulation of salt mixture containing potassium chloride and magnesium sulfate hydrate, which can solve the problem that magnesium is difficult to dissolve

Inactive Publication Date: 2014-12-31
德国钾盐集团股份公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Manufactured by prior art methods, a large part of magnesium is difficult to dissolve in water, especially monohydrate or synthetic magnesium sulfate containing 5 / 4 crystal water

Method used

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  • Granulation method of salt mixture containing potassium chloride and magnesium sulfate hydrate
  • Granulation method of salt mixture containing potassium chloride and magnesium sulfate hydrate
  • Granulation method of salt mixture containing potassium chloride and magnesium sulfate hydrate

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Embodiment Construction

[0014] For the method of the present invention, the preferred extrusion granulation or agglomeration granulation method is implemented.

[0015] In the case of extrusion granulation, this is accomplished by extrusion of a salt mixture of potassium chloride and natural magnesium sulphate monohydrate which has been previously treated with an aqueous solution of an alkali metal citrate salt. The citrate can be added to the salt mixture not only in solution but also in solid form. In the latter case, it is best to add a small amount of additional water to the salt mixture. Extruder types known from the prior art for similar purposes are, for example, stamping presses, extruders, hole presses and roller presses.

[0016] In the agglomeration and granulation process used in the present invention, the particles containing potassium chloride and magnesium sulfate hydrate (especially the salt mixture of natural magnesium sulfate monohydrate or synthetic magnesium sulfate monohydrate) ...

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Abstract

The present invention relates to a method for granulating a salt mixture containing potassium chloride and at least a magnesium sulfate hydrate, wherein the salt mixture contains 35-50% of potassium (calculated as K2O) and 2-10% of magnesium (calculated as water soluble MgO). According to the method, the granulating process of the salt mixture is summarized; and during the mixing process, a citric acid alkali metal salt, preferably an aqueous solution of a citric acid alkali metal salt (citrate), or a powdery citrate is adopted to treat the salt mixture.

Description

technical field [0001] The invention is used for granulating a salt mixture comprising potassium chloride and at least one hydrated magnesium sulfate. This granulated salt mixture contains potassium, expressed as K 2 Calculated as O, the content is 35%-50%, and the salt mixture contains water-soluble magnesium, calculated as water-soluble MgO, the content is 2%-10%. (the % mentioned in this paper are all percentages by weight). Background technique [0002] Mixtures of potassium chloride and magnesium sulfate hydrate have been widely used in agriculture as complex potassium-magnesium fertilizers, not least because the two salts are completely water-soluble and can be directly absorbed by plants in a ready-acting form after fertilization. Mixtures of potassium chloride, natural magnesium sulphate monohydrate or added sodium chloride have proven particularly effective, where K 2 The O content is 35-50%, for example about 40%, the water-soluble MgO content is 2%-10%, for exa...

Claims

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Application Information

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IPC IPC(8): C05D11/00
Inventor 贵多·鲍克斯忒芬·德雷斯尔乌尔里克·克莱恩克勒夫曼恩斯特·安德烈斯
Owner 德国钾盐集团股份公司